Interstellar Reddening
Dust grains along the line of sight scatter and absorb light coming from distant objects. We therefore see these objects as dimmer and redder than they really are.
Interstellar Reddening and Extinction.
Interstellar space is not a perfect vacuum.
Interstellar Reddening
The process in which dust scatters blue light out of starlight and makes the stars look redder than they actually are.
Inverse Square Law ...
Interstellar Reddening
The reddening of starlight passing through interstellar dust, caused by the fact that dust scatters blue light more than red.
Interstellar Space ...
Interstellar reddening and extinction
Our Milky Way galaxy, like most spiral galaxies, is filled with dust.
Interstellar Reddening: As light from a star travels through interstellar space it encounters some amount of dust. This dust scatters some of the light, preferentially the short wavelength (blue) components.
Unfortunately, the effects of interstellar reddening due to intervening dust both in our own galaxy and in the parent spiral galaxies of extragalactic Cepheids can be quite severe and are very much stronger.
This preference for dust to scatter short wavelength light causes another effect known as interstellar reddening.
Interstellar reddening
Heliosphere
Intergalactic space
List of molecules in interstellar space
Outer Solar System
Outer space
Solar system
Stellar system
Timeline of knowledge about the interstellar and intergalactic medium ...
It was only after Kapteyn's death, in Amsterdam, that Robert Trumpler determined that the amount of interstellar reddening was actually much greater than had been assumed.
Nevertheless, this calibration is not straightforward, because many effects are superimposed in such diagrams: interstellar reddening, color changes due to metallicity, and the blending of light from binary and multiple stars.
Since the distances and intrinsic luminosities of many stars are estimated from analysis of their spectra, this effect, called interstellar reddening, has been responsible for errors in calculating the distances and luminosities of these stars.
 See also: Reddening, Astronomy, Galaxy, Star, Light
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